Synthesis of substituted 4-(3-alkyl-1,2,4-oxadiazol-5-ylmethyl)-3,4-dihydro-2H-1,4-benzoxazines and 4-(1H-benzimidazol-2-ylmethyl)-3,4-dihydro-2H-1,4-benzoxazines
作者:Pushpak Mizar、Bekington Myrboh
DOI:10.1016/j.tetlet.2006.08.029
日期:2006.10
Substituted 2H-1,4-benzoxazines were synthesized from substituted 2-amino phenols and 1,2-dibromoethane using K2CO3 in good to excellent yields. The cyclized products were further reacted with alkyl bromides to obtain the desired N-substituted 3,4-dihydro-2H-1,4-benzoxazines.
使用K 2 CO 3由取代的2-氨基苯酚和1,2-二溴乙烷合成了2 H -1,4-苯并恶嗪,收率良好。使环化产物进一步与烷基溴反应,得到所需的N-取代的3,4-二氢-2 H -1,4-苯并恶嗪。